/Engine/Source/Runtime/Core/Public/Internationalization/ITextFormatArgumentModifier.h
Given the argument, evaluate the result and append it to OutResult
void Evaluate ( const [FFormatArgumentValue](API\Runtime\Core\Internationalization\FFormatArgumentValue) & InValue, const FPrivateTextFormatArguments & InFormatArgs, [FString](API\Runtime\Core\Containers\FString) & OutResult ) const